| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Dec 31, 2024 | Dec 27, 2024 | 001-08266 | |
| 4 | Open Document | Open Filing | Jan 17, 2023 | Jan 12, 2023 | 001-08266 | |
| 4 | Open Document | Open Filing | Feb 18, 2022 | Feb 16, 2022 | 001-08266 | |
| 4 | Open Document | Open Filing | Jan 26, 2022 | Jan 24, 2022 | 001-08266 | |
| 4 | Open Document | Open Filing | Dec 11, 2020 | Dec 9, 2020 | 001-08266 | |
| 3 | Open Document | Open Filing | Sep 23, 2020 | Sep 16, 2020 | 001-08266 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 5, 2019 | Apr 3, 2019 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 31, 2018 | Jan 29, 2018 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 7, 2017 | Feb 3, 2017 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 8, 2016 | Dec 23, 2015 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 6, 2015 | Feb 5, 2015 | 000-54710 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 15, 2014 | Dec 11, 2014 | 000-54710 |
| 4 | Open Document | Open Filing | 4 | Mar 18, 2014 | Mar 14, 2014 | 000-54710 |
| 4 | Open Document | Open Filing | 4 | Feb 14, 2014 | Feb 12, 2014 | 000-54710 |
| 4/A | Open Document | Open Filing | 4/A | Feb 3, 2014 | Dec 16, 2013 | 000-54710 |